Midfielder Graham Kavanagh has left Sunderland by mutual consent.
The 35-year-old, one of six men to sign for Roy Keane on the final day of the summer transfer window in August 2006, has agreed to end his contract after spending two months on loan at League One Carlisle.
Republic of Ireland international Kavanagh, whose deal was due to expire at the end of the season, made only 15 appearances for the Black Cats after being hampered by a knee injury.
He said: "I'm gutted that, due to my knee injury, I didn't get to play more games for the club.
"I'll be moving on to pastures new, but I'd like to thank everyone at the club, especially the fans for their fantastic support during my time here."
Kavanagh will join Carlisle in a player/coaching role and is looking forward to his new challenge at Brunton Park.
"This is a new challenge for me, but it's one that I'm looking forward to," Kavanagh told the club's official website.
"I'm looking forward to combining the playing and coaching side of things and hopefully we will continue to build on the improvements that have been made recently.
"There are some very good players here and it will be good for me to be able to help Greg in what he is trying to achieve."
Carlisle boss Greg Abbott added: "We've already seen the influence that Graham brings in to the dressing room and out on to the pitch, and that's what experienced players can do for you.
"I think this is a very good signing for us, and I'm looking forward to working with him."